<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>边框颜色</title>
  <style>
    p.one {
      border-style: solid;
      border-color: red;
    }

    p.two {
      border-style: solid;
      border-color: green;
    }

    p.three {
      border-style: dotted;
      border-color: blue;
    }
  </style>
</head>
<body>
<p class="one">红色实线边框</p>
<p class="two">绿色实线边框</p>
<p class="three">蓝色点状边框</p>
</body>
</html>